donaldson



A, F. DONALDSON.

3 SHEETSSHEET l.

A. F. DONALDSON.

BROACHING MACHINE.

APPLICATION FILED MAY 19. 19:}.

1,318,485. Patented Oct. 14,1919.

3 SHEETS-SHEET 2.

@ (DOC) Ipve for A. F DONALDSON.

BROACHING MACHINE.

- APPLICATION FILED MAY 19 I91?- I v ,latented 0M. 14, 1-919 3 SHEETSSHEET 3- UNITED STA ES ATENT OFFICE.

AUGUSTUS E. DONALDSON, O'E TOLEDO, OHIO, ASSIGNOR TO THE HU ING BRASS & BRONZE COMPANY, OE TOLEDO, OHIO, A CORPORATION OF OHIO.

BROACHING-MACHINE.

To all whom it may concern:

resident of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Broaching-Machine; and I do hereby declare the following to be a full,

-clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the same, reference being had. to the accompanying drawings, and'to the characters of reference marked thereohfwhich form a part of this specification.

My invention relates to broaching machines-and it has for its object toprovide an efficient broaching machine .that will rapidly broach articles. -The extremely great pressure required to broach articles by a. rapidly moving ram-makes it exceedingly difiicult to produce a-commercially operative automatic feed control machine Whichjwill turn out I bed plate.

bushingsor other articles with a smooth correctrbore.

I have also provided 'a centering means which will automaticallyfcenter the bushings or other articles and will readily coact with the feeding. means in receiv ng the articles and" coact-withth'e feeding means 30 in the ejectment of the articles.

The inventionma y becontained in construction of different forms. I have selected one of such construction as aneXample of constructions containing the invention 'and shall describe it hereinafter. 'The construction selected is illustrated in the, drawings. Figure l of the drawings illustrates asideview of. part of themachine- Fig. 2 illustrates a broken view of the feed operatingmechanism. Fig. 3 illustratesa sectional view of a part of the centering means taken on-line 33 indicated in Fig. 4L". Fig; is a top View of the bed plate of themachme,

Fig. 5 is a top view'of the bed plate above the stripper plate. Fig. 6 is a sectional view taken on line 66 indicated in Fig.5.

. 1, Fig. 1, is a ram. '2 is a breach. 3 is a A suitable means is provided for moving the broach relative to the bed plate, such as crank. and connecting rod.

Articles such as bushings are fed beneath the broach .in the broaching operation. They are means by the guides formed of angle-irons 4:, and a. rod 44 secured to a bracket 45. The

located above the bushings. held" in position by a 'plate 17 in which it is uided to the automatic feeding Patented Oct. 14, 1919.

Application filed may 19, 1917. 'Serial NO. 169,643.

' f bushings 5 are engaged one by one by the Be 1t known that I, AUGUSTUS F.- DONALD- "soN, a cltlzen of the United States, and a of the bed plate and to a bracket 9 secured to a suitable part of the machine. A rod 10 is secured to the rod 8. A compression spring 11 is placed"around the rod .10 "and between a washer l2 and the bracket" 9 to cause return of the r odeto normal o r'bushing centering position. lever arm .13 engages the end of theroii. 8 to move it-to bushing engaging position.' The lever. 13 may be pivoted to the bed plate 3. It is provided with a roller let which is operated upon by the rod 15 that is connected to the ram 1 by a suitable means such as the arm 16. The rod 15 is beveled at its end 40 so as to engage the/roller 1l-and push the lever 13 toward the plate which coacts with the spring 11 to move the'feed rod-6 back and forth. The length of the rod- 15 is such that the feed rod 6 is moved inward by the spring 11 when the ram has drawn the broach away from the bed plate and from the bushings.

A stripper plate 16 of hardened metal is It is securely socketed and which is bolted to the bedplate -3-. Thestripper plate 16 strips thebushings fromthe broaoh as it is withdrawn after broaching.

The] centering means located beneatlr the stripper plate 16. A hardened plate 18 having a surface located at a slight angle to the direction of movement of the feed rod 6-is bolted to an adjustable plate or member 19 which islocated in a slotted way 20 located in a plate 22 which is'secured tothe bed .3. Opposite the plate'18 is disposed a coacting'yielding centering member 23 hav- 'ing ears 24.. -Within the ears there are lo cated a pair ofr'ollers 25 that engage the bushings and push themagainst. the plate 18 by the action of the spring 26." The slidin member 23 moves between angle irons 2 and is pushed forward by the spring 26 which is located between the rod or plate 29 and, the member 23. The forward m0vement is limited by the stops 30, 31 located on the member 23 and the plate 32 which is adjustably bolted on one of the angle irons-27. It may be locked from movement l the screw 33, which passes through the slot.

and away from the work-when. desired, by

34 formed in the member 23.

The stops 31 and 230 permit the rollers 25 to be so placed relative to the plate 18 that is carried by the roller and its pressure thereon against the other roller so thatthe bushing is held by the pressure of the-spring 26 between the rollers and the plate or anvil I 18 and in alinement with the -broach 2.

The broaeh, in the operation, moves downward, the feed rod 6 being drawn back in position to engage a bushing. The broaeh passes through the bushing in centered position, the rod 6 being held back by the rod.

' 15, and through the opening 35 in the bed plate 3 and then returns, the bushing being engaged by the stripper plate and removed from the broach. 'The rod 6 then is permitted to move forward by the action of the spring 11 pushing a bushing into position-of engagement bythe roller 25 which centers the bushing for the next operation.

The bushings are directed away from the broaeh by. the angle irons 43.

I claim:

1. In'a' broaching machine the combination of a ram, a broaeh secured to the ram, a feeding means, a centering means for centering the articles operated upon by the broach to which they are fed by the feeding means, and cooperating with the feeding means for ejecting the articles from beneath the broach.

2. In a broaching machine the combinationof a ram, a broaeh connectedto the ram, a feed rod operated by the ram, a yielding centering means having a plurality of rotatable centering members for centering the articles operated upon by the broach.

3. In a broaching machine the combination of a ram, a broaeh connected to the ram,

a feed member, means for operating the member, a yielding centering means having a plurality of rotatable centering members for centering the articles operated upon by the broaeh, and cooperating with-the feed member for ejecting the articles from beneath the broach.

4:. In a broachi-ng machine-the combination of a ram, a broaeh connected to the ram,

a feed rod operated by the ram, a yielding centering means' having a plurality of rotatable centering members"for centering the articlesoperated upon by the broaeh, and cooperating with the feed rodfor ejecting the articles from beneath the broaeh, and

guides for guiding the articles .to the end of the feed rod and to the rotatable members and away from the rotatable members. i

ram, a feeding means, a .pair of rotatable cylindrical centering members for engaging and centering the articles operated upon by the broach.

7. In a broaching machine, a ram, a

broach connected to the ram, a yieldingcentering means having a plurality of rotatable centering members for centering the articles operated upon by. the broaeh, a member for forcing the articles to a point to be engaged bythe rotatable centering members.

.8. In a broaching machine, a ram, a

broach connected to the ram, a feed member, means for operatlng the'member, a plurality 'ofcylindrical centering members for centering the articles operated upon by thebroaeh and cooperating with the feed member to eject the articles from beneath the.

breach, astripper plate for removing articles from the broach.

9. In a broaching machine, a ram, a

broaeh secured to the ram, a feed member,

5 a centering means for centering the articles operated upon by the broaeh to which they are fed by the feeding member, the centering means having an-anvil and a pair of yielding rollers, the rollers for pressing the articles at two. points and against the anvil.

10. In' a machine for broaching bushings, a ram, a broaeh connected to the ram,- a feeding means and a centering means having an anvil and a pair of yieldable contact,

membersfor forcing the bushing against the anvil for centermg it beneath the broach.

In testimony whereof, I have hereunto signed my name to this specification.

AUGUSTUS F, 'DONALDSON.

70 bodies, a' ram, a broachconnected to the 

